Spot-ground



A. C. HORN.

SPOT GROUND.

APPLICATION FILED MAR.14, 1917.

1,3 33 l Patnted J111yv27, 1920.

UNITED sixfrss .AARON C. HORN", OF NEW YORK, N. Y.

SPOT-GROND.

Application filed March 14, 191'?.

` specification.

This invention relates in general to what is known in the building artas grounds or spot grounds, and in particular to screeds or framingpiecesadapted to form a basis for other structure, and which may beeffectively and readily attached at any desired point to a wall,partition or floor.

In fire-proof building construction, it' becomes lnecessary to fastenground strips to a concrete, plaster, tile'or the like wall, partitionor Hoor. The usual nail or screw attaching means clearly cannot beavailed of with advantage in such cases and the direct attachment ofthese strips has been limited, as for example, to the location of thejoints between blocks. Recourse has been had to several methods forproviding suitable-'- points of? attachment for the grounds, but thesealways involve extra time, labor and material and substantially increasethe cost of construction. One method commonly used is kthat of diggingoutfmortar'joints into which the grounds are driven.V But' this requiresmuchadditional timeand labor and consequent extra cost.

Cement compositions such as plaster of' Paris have been used'to attachgrounds to desired .points on the wall or partition. But for thispurpose the grounds-have hitherto been made with av metal base adaptedtobe embedded inthe cement. This meta-l construction presents manypractical difficulties. Thus, the base having a smooth surface, the bondbetween it and the plaster is not sufficiently strong.' Furthermore,water is always needed .in building construction to give plasticity tothe materials used. Therefore, there is always present in the structuresome moisture which together with the oxygen willcorrode the metal plateand cause it to wear away and eventually penetrate-,thewooden ground andcause it to vdeteriorate, while the -bond between the metal Yplate andthe adhesive means ultimately Specification of'Letters Patent.

Patented July 27, 1920. serial No. 154,711.

and the plaster by perfor-ating the former and allowing the cementcomposition to pass therethrough.. But this involves-a material increasein cost of manufacture ofthe metal base, and as a whole the metal backedground may be said to be too expensive for the -purpose sought to beattained thereby, in view of its aforementioned disadvantages.

@ne object, therefore, of this invention is to provide a spot groundwhich' shall be effectively and readily attachab'le toany wall,vfloor orpartition at any desiredpoint thereon. Y v

Another object ofthis invention is to provide a spot ground of thischaracter which shall be free fromthe disadvantages ofthe meta-l backedground and yet cheap to manu facture.

A furthert objectl of this invention is to provide a spot ground ofthecharacter described which shall be durable, neat and compactfand easilyAhandled and'shipped.

Further objects and advantages of this invention will appear from thedetailed description and the features of-novelty will be particularlypointed out in the claims.

In the accompanying drawings forming a part ofthis specification,

Figure lisa broken away view showing the improved spot ground in use asa framing piece for the attachment'thereto of wooden building-parts,such as moldingand the like structure.

Fig. 2 is an enlarged broken away sectional view of one form ofv the'vimproved spot ground.

Fig. shows a modified form of the spot ground in use as on improvedf'urring strip for waterproofing.

Figs. 4:, 5, 6 and 7 show further modiied embodiments of this Iinvention.

Referring particularly to the drawings, my improved ground is seen ltoconsist of a block 10 madeof any material into which nails or screws maybe driven and is formed with a face 11 to which may bey nailed a facingstrip, molding or the like wooden building partV 12 after theplastering'l has been applied to the wall. The blockis further formedwith an enlarged base 14 to which is attached a strip of some suitableAwaterproofing material 1.5. In the particular construction shown in thedrawing, this waterproofing strip is attached to the base ofl the screedby some suitable adhesive means such :as a coating 16 of some asphal tiecement and is composed preferably of several layers 17 of felt or fabricsaturated with a hot bituminousy compound and cemented together tosecure structural strength. This construction waterproofs the spotground fromV the wall or other 5 structure 18 to which it is attachedVand thus preserves it from deterioration'. As will be clear ,from thedrawing, the outer surface of the waterproofing strip 15 is coated witha layer of quartz or silica preferably made up of pebbles 19, and thescreed thus presents a rough irregular Vsurface to the adhesive means20, such as plaster of Paris, whereby it is secured to the wall -orother structure at any desired point. As will be readily understood, thebond between the cement 2O and the waterproofing strip is materiallyincreased by the irregularities in the surface 19 and thus the screedmay be positively and firmly secured at any desired point. v In themodified form shown in Figs. 5 and 6, the waterproofing layeriscircularin form and has portions 21 extending beyond the base Ybothfaces of which kare pebbled. lThis construction presents a largerbonding area and permits of the formation of the perforations 22 in saidextended portions through which some of the cement may be squeezed whenthe screed is pressedthereinto, to aid in more effectively securing thescreed therein, by the spreading of the ceL ment over the under face ofthe waterproofing strip. Y

In another modiliedform shown in Fig. 4, the base 12 is circular and hasperforations 23 to register with the smaller per- `forations 22 in thecircular waterproofing layer attached thereto.

In still another modifiedpform shown in Fig. 7 the sides of the screedare formed with dove-tail recesses 24, into 'which the plastering 13enters to form a wedge to aid in morefirrnly securing the screed.v Inthis form the waterproofing layer extends around the sides of the screedup to the dove-tail recesses as shown at 25 in the figure. Y

In Fig. 3 a form of screed is shown which is specially adapted to serveas a furring strip when. it is desired to waterproof inner plastering 26from an outer exposed wall or other structure 27. The screed for thispurpose has additional waterproofing material 28 on its sides andexposes only one face to which the lath or plaster board 29 maybenailed. Y

A. furring strip constructed inthis way is, of course, more durable andclearly effects better superstructural waterproofing than that hithertohadV with'the ordinary metal covered wood furring strips to which allthe objections raised against Vmetal backed screeds apply with evengreater force, due to the presence of moisture in much largerquantities.

I-Iaving thus described my invention, I claim as new and desire tosecure by Letters Patent 1.V A spot ground for concrete or similarfloor, wall, or partition construction comprising afiber block, -saidiiber block formed with a face for nailing wooden building partsthereto, and having an enlargedba'se 75 and a nonmetallic waterproofingstrip attached thereto, said strip having an exposed rough pebbledsurface.

2. In combination with a concrete or similar supporting structure, andadhesive means disposed at any desired point thereon,

a spot ground adapted to be attached to said' structure by said adhesivemeans, said spot ground comprising a fiber block and a strip ofnonmetallic waterproofing attached thereto along one face of the former,there being a pebble layer attached to the other face thereof wherebythe latter presents a rough surface to said adhesive means to form afirm bond therewith,

3. In combination with a concrete or similar supporting structure, andadhesive meansdisposed at any desiredpoint thereon, a spot groundadapted to be attached to said structure by said adhesive means, saidspot ground comprising a ber block, said fiber block formed with a facefor nailing auxiliary 'building parts thereto and having an enlargedbase portion and a nonmetallic waterprooflngstrip attached thereto andex.- tending beyond the sides of said base, the extended portions ofsaid strip being Vprovided with perforations for the passage of saidadhesiveV means therethrough, and .an :1

outer layer of'small hard particles on each 105 face thereof to presentan irregular lsurface to said adhesive means for forming a firm bondwith Said adhesive means.

4c. In combination with a concrete or simis lar supporting structure andadhesive'means 110 ldisposed at any vdesired point thereon, a spotground adapted to be attached to said structure by said adhesive means,said spot ground comprising a fiber block, said ber Vblock formed with aface for nailing wooden 1 15 building 'parts thereto and having anenlarged base portion and a nonmetallic waterprooiingstrip attachedthereto, said wateri proofing strip and base portion having perx`forations therein for the passage of said adhesive means therethrough,and an outer layer of small hard particles on each face thereof topresent an irregular surface to saidadhesive means for forming a firmbond with Said adhesive means.

I superstructural waterproofing, in combination with an exposedstructure, an

vintermediate lining strip and an inner plastered layer to bewaterproofed from said ex- 1 posed structure by theV furring process, a

urring strip adapted to be secured between said structure and liningstrip to form an air space therebetween, said furring strip cornprisinga liber block covered with a layer of waterproofing material, the outerface thereof being coated with a layerrof small hard particles topresent a rough surface, one face of said block remaining exposed forthe attachment of the lining strip and plastered layer thereto in spacedrelation to said eX- posed structure.

6. A spot ground for building construction comprising a fiber blockformed with a face for nailing wooden building parts thereto and havingan enlarged base and a water proof strip attached thereto, said stripvcomprising layers of fabric saturated with a bituminous compound andcemented together, the outer layer having an exposed rough pebbledsurface.

Signed at New York city, in the county of New York, and State of NewYork, this tenth day of March A. D. 1917.

AARON C. HORN.

